Fulcrum support



Aug. 12, 1924 1,504,559

} H. 0. HEM

FULCRUM SUPPORT Filed April 5, 1920 HRH/DIX El HER};

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application filed T all whom it may concern:

Be it known that I, Ham or. O. Hun. a citizen of the United States,residing Toledo, in the county of Lucas and l st of Ohio, have inventedcertain new and ful Improvements in Fulcrum gupports. or which thefollowing is a Specifict on.

This invention relates to weighin scales and particularly to means forsu 1 fulcruming levers. lVeighing often include one or more levers. therulcrums of which are suspended by means of a link usually from a shelf.Such levers are commonly called shelf levers. The means employed forattaching the link to the shelf is usually merely a hook belt or eyebolt.

Owing to its tendency to twist when the nuts are turned up, it is verydiicult to pro j position such an eye bolt. The eye lDOlL IS notsusceptible of adjustment and for reason, or because of bending of the ma of the shelf to which it is secured or bending of the shank of thebolt itself, out of plumb conditions often creep into the system andresult in errors that are difficult to detect or avoid. One of theobjects of this invention is to provide a device for supporting a leverfrom a shelf which is so secured to the shelf as to eliminate danger ofthe shelfs bend'- Another object is to provide a supportin device whichis itself incapable of appreciable distortion.

Another object is to provide a supporting bracket which may beaccurately ad justed and positioned.

Still another object is to provide a device to support a shelf lever onknife edge pivots.

Other objects and advantages will be apparent from the followingdescription, in which reference is had to the accompanying drawingsillustrating a preferred embodiment of my invention and wherein similarreference numerals designate similar parts throughout the several views.

In the drawings Figure 1 is a front elevation of a scale cabinet showinga shelf lever supported by the bracket of my invention;

Figure 2 is an enlarged front elevation of the shelf and bracket, partsbeing broken away; and

Figure 3 is a. view taken from the right of Figure 2.

It is to be understood that the type of scale illustrated in Figure 1 ismerely ex- Serial. No. avian.

emplary and that my invention is equally adapted for use in scales ofother types. In this figure a cabinet 1 is shown surmounted p asubstantially watclrcusi shapcd housing 2 which contains automaticload-offsetting mechanism (not shown) suitably connected to theindicating hand I which swings over a dial A hook rod depends from themechanism within the cas ing 2 and is connected at its lower end l 2means of a stirrup 6 to a beam lever T fut crumed upon a stand 8 whichin turn is supported by a shelf 9 within the cabinet 1.

From the lever 7, to which its upper end is connected by means of astirrup 1(. an adjustable link 11 depends through an opening in theshelf 9 its lower end being connected by means of a stirrup 12 to oneend of a shelf lever 18 which is connected through a stirrup 14; andsteelyard 15 to the platform lever mechanism (not shown) of the scale.The other end of the shelf lever is supported, through the link 16 andstirrups 17 and 18, from the bracket 19 of my invention.

This bracket comprises a plate 20 of considerable area having a boss 21on its lower side in which is set a knife-edge pivot to project fromeach side thereof ith its knife edges turned upwardly. in order tostrengthen the structure and give a tinished appearance, gussets orbraces and 24- are formed bet ween the sides of the plate 20 and thesides of the boss 21. Tapered elongated bolt openings 25 are provided atthe ends of the plate 20, and surrounding each of said openings upon theupper face of the plate 20 is an annular boss 26. The shelf 9 isprovided with bolt holes 27 so that in assembling the device the bracketmay be approximately positioned beneath the shelf and bolts 28 )flSSGClthrough the bolt holes 27 and the openings 25 and screwed into nuts 29,which are preferably of such size and shape that they are prevented fromturning by the flanges or gusset-s A3 and 24.

It is apparent that the bracket may. because of the elongation of theopenings 25, be moved :ward and back until the connections are plumbed,and that when the bolts 28 are screwed into the nuts the bosses 26 arepermanently clamped against the shelf at widely separated points.thereby reinforcing the shelf so that there is little l downward pull ofthe steelyard on the le likelihood of its becoming bent in use. i so,

since the knife-edge pivot of the bracket is located substantiallymidway of the bosses 52 5, the force exerted on this pivot by t e ver 13will be divided between the bosses an thus distributed over a Wide area.

The knife or ee pivotal connection between the bracket and stirrup 13not only relieves the bracket of some of the strains that Wont otherwisebe set up. but also reduces friction at this point and thereby increasesthe accuracy of the uueigrhinemechanism as a Whole.

hile it will be apparent that the ill etrated embodiment of my inventionherein disclosed is well calculated to aeequatcly fulfill the objectsprimarily stated. it is to be understood that the invention issuscepti'ble to variation modification and change Within the spirit andscope of the SilbjOlll j l claims.

Having described my invei'it on, I claim:

1. In a device of the class described, in combination. a bracket. aknife edge pivot secured to said bracket, a link depending; from saidpivot, and a shelf lever. said shelf lever having its fulcrum supportedby said link.

2. In a device of the class described. in combination a bracket. asuppor therefor. means for adjustably inountinc said bracketupon saidsupport. a knife edgze pivot secured to said bracket. link dependingfrom said knife edge pivot. and a shelf lever, the fulcrum of said shelflever beingsupported by said link.

3. In a device of the class described. in combination. a weie 'ne scale't'raine. includine" a shelf. a lever supportin c bracket mounted onsaid shelf. said bracket having: a knife edge pivot secured thereto. alink depending from said pivot, and a shelf lever. the fulcrum of saidshell lever being supported by said link.

4. In adevice of the class described. a

11f. in comlever supporting bracket comprisin bination, a plate having apair of elong ged openings. a boss formed upon the lower face oi saidplate. and gussets between the sides of said beam and the s of plateforming nut-en e'ae'ing nanqes at sides of said openings.

5. In a device of the .ass described. a e ver sup iortinp' bracketcon'iprisinjl, in ronr bination. plate having a pair o t' elongatedopenings. a boss formed upon the lower face (ll: Plato yllssets betweenthe s des. o i said boss and the sides of said plate fornn nut-engaging;flanges at the sides of said openings. and annular re sed portions onthe upper face of Sa li plate surrmimlinp' said openings.

6. In a device of the class described. a

shelf lever supporting bracket comprising); a plate having a pluralityof l'iUSSQS adapted to engage er face of said plate. eussets between thethe upper face of said plate. surrounding sa'd openings. and knife edpgepivots pro- .ecting rom the sides of said boss.

{A LVOR O. HEM.

Witnesses C. E. lViLooX, C. O. MAnsHALL.

